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<head><meta charset="utf-8"><title>I-prioritize #73717 Compile-time regression with mir-opt-lev · t-compiler/wg-prioritization · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/index.html">t-compiler/wg-prioritization</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html">I-prioritize #73717 Compile-time regression with mir-opt-lev</a></h3>

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<a name="201975495"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201975495" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201975495">(Jun 25 2020 at 14:22)</a>:</h4>
<p><span class="user-group-mention" data-user-group-id="2403">@WG-prioritization</span> issue <a href="https://github.com/rust-lang/rust/issues/73717">#73717</a> has been requested for prioritization.</p>



<a name="201975704"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201975704" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201975704">(Jun 25 2020 at 14:24)</a>:</h4>
<p>When did this regress? Do we need bisection?</p>



<a name="201999130"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999130" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999130">(Jun 25 2020 at 17:26)</a>:</h4>
<p>well this one is <code>requires-nightly</code></p>



<a name="201999145"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999145" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999145">(Jun 25 2020 at 17:27)</a>:</h4>
<p>maybe we shouldn't even prioritize it :P</p>



<a name="201999181"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999181" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999181">(Jun 25 2020 at 17:27)</a>:</h4>
<p>maybe <span class="user-mention" data-user-id="125250">@Wesley Wiser</span> knows better about this</p>



<a name="201999285"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999285" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999285">(Jun 25 2020 at 17:28)</a>:</h4>
<p>My personal opinion is that <code>requires-nightly</code> issues shouldn't be prioritized higher than <code>P-medium</code>.</p>



<a name="201999301"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999301" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999301">(Jun 25 2020 at 17:28)</a>:</h4>
<p>As a general rule of thumb.</p>



<a name="201999344"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999344" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999344">(Jun 25 2020 at 17:28)</a>:</h4>
<p>Since they cannot impact stable users.</p>



<a name="201999386"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999386" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999386">(Jun 25 2020 at 17:28)</a>:</h4>
<p>But yeah, I'm not sure we should prioritize it either.</p>



<a name="201999470"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999470" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999470">(Jun 25 2020 at 17:29)</a>:</h4>
<p>+1 for no prioritization</p>



<a name="201999509"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999509" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999509">(Jun 25 2020 at 17:30)</a>:</h4>
<p>This doesn't really require the attention of the team</p>



<a name="201999571"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/201999571" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#201999571">(Jun 25 2020 at 17:30)</a>:</h4>
<p>But rather of the mir-opt WG only</p>



<a name="202001283"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2373717%20Compile-time%20regression%20with%20mir-opt-lev/near/202001283" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2373717.20Compile-time.20regression.20with.20mir-opt-lev.html#202001283">(Jun 25 2020 at 17:45)</a>:</h4>
<p>agreed, during today's meeting I saw this issue quickly and didn't realize about <code>requires-nightly</code> flag</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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